25653739 has 2 divisors, whose sum is σ = 25653740. Its totient is φ = 25653738.

The previous prime is 25653721. The next prime is 25653751. The reversal of 25653739 is 93735652.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 25653739 - 2¹³ = 25645547 is a prime.

It is a super-5 number, since 5×25653739⁵ (a number of 38 digits) contains 55555 as substring. Note that it is a super-d number also for d = 2.

It is not a weakly prime, because it can be changed into another prime (25653769) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12826869 + 12826870.

It is an arithmetic number, because the mean of its divisors is an integer number (12826870).

Almost surely, 2^25653739 is an apocalyptic number.

25653739 is a deficient number, since it is larger than the sum of its proper divisors (1).

25653739 is an equidigital number, since it uses as much as digits as its factorization.

25653739 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 170100, while the sum is 40.

The square root of 25653739 is about 5064.9520234648. The cubic root of 25653739 is about 294.9286009338.

The spelling of 25653739 in words is "twenty-five million, six hundred fifty-three thousand, seven hundred thirty-nine".